http://callofduty.wikia.com/wiki/KillstreakSIMPLICITY
Star Wars Battlefront marks a return to a simpler time of shooter games. There are no killstreaks, perks, or weapon attachments. No prone stance, or limited movement when aiming down a sight. Access to powerful weapons and vehicles are scattered around the map for the taking. Weapons have unlimited ammo in addition to an active-reload style cooldown system, and are weaker than most of todays shooters which result in longer times to kill.
Ummm.....
Basically COD killstreaks can net you unfair advantages like airstrikes and UAVs. They are referring to this.
BFront killstreaks are just for points.